Answer:
45
Step-by-step explanation:
We know the answer is B, because we would need to divide the 20 by 4 and the 12 by 4 in order to see the equal amounts of balls each friend has.
If you divide the age by the height the quotient is 3.57 in each case so it is direct variation
C is correct
2*pi*R is the equation for circumference
seeing as the number isn't multiplied my pi yet all we have to do is divide by 2
the radius of the circle is 100<span />